Comment This will be mankinds greatest mark on the world (Score 4, Interesting) 85
In a hundred years, there will be nothing but abandoned cities under flood waters. Humans and many other animals will be dead. But there will be some bacteria with this extra base pair.
In a hundred million years, there will be no other evidence we were even here. Perhaps a future intelligent species will look back and wonder why some bacteria has more DNA than other life. They will make many interesting theories. Some will theorize that a previous intelligent species created the third base pair. And those that do will be called crackpots.